57047447 has 2 divisors, whose sum is σ = 57047448. Its totient is φ = 57047446.

The previous prime is 57047411. The next prime is 57047449. The reversal of 57047447 is 74474075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57047447 - 2¹² = 57043351 is a prime.

It is a super-2 number, since 2×57047447² = 6508822418435618, which contains 22 as substring.

Together with 57047449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57047447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57047449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28523723 + 28523724.

It is an arithmetic number, because the mean of its divisors is an integer number (28523724).

Almost surely, 2^57047447 is an apocalyptic number.

57047447 is a deficient number, since it is larger than the sum of its proper divisors (1).

57047447 is an equidigital number, since it uses as much as digits as its factorization.

57047447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 38.

The square root of 57047447 is about 7552.9760359742. The cubic root of 57047447 is about 384.9568670406.

The spelling of 57047447 in words is "fifty-seven million, forty-seven thousand, four hundred forty-seven".